Apparatus for polishing dies



May 20, 1930. F. KRAUSE 1,758,953

APPARATUS FOR POLISHING DIES Filed Feb. 3,. 192's z Sheets-Sheet 1 l N VENTO R frat/Z [fr-am? 411w ATTORNEY May 20, 1930. F.'KRAUS E APPARATUS FOR POLISHING DIES Filed Feb. 5, 1928 3 Sheets-Sheet 2 INVENTOR fi'ezierir/l'rauwe MA'ITORNEY May 20, 1930.

'APPARATUS FOR POLISHING DIES Filed Feb. 3, 1928 5 Sheets-Sheet 3 I N V ENTOR fiederw [ram/"c M ATTORNEY F. KRAUSE I 1,758,953

Patented May 20, 1930 1 TED STATES "7P ATE NTf OFFICE FREDERICK KRAUSE, F JERSEY CITY, NEW JERSEY APPARATUS FOR POLISHINGDIES Application filed February 3, 1928. Serial No. 251,565.

for mounting the die so'that it can be rotated,

..;and=:.simultaneously -.recipr.ocating:;and oscil- -l:-lating;.ai-polishing .rod. v through the. opening ::of thetdie. Thusthe whole inside surface of the: lopening is... smoothed. and polished, and .zthe-necessaryconfiguration isobtained.

The A naturejhof .the invention is fully :set

: ZOJ'fOIthE in the following description taken with ..-drawings which illustrate one .ormore. em- ;bodiments ofv theinve'ntion; and the novel features ofv'the device are pointed out in the -appended claims. The disclosure,.however, is dexplanatory only and I reserve the rightlto .makea-such 'cha'ngesiin. the shape, size-and uiarrangements..ofthe' parts as arewithin the :principlecof theiinventionrand-do not exceed i the scope thereof.-

.On .the 'drawingsfFi'g. :1, isa front view partlytinasentionnf a polishingdevice accord- .Lingto my invention.

I Eigx2ais-alside view .ofsame.

-Eig." 3. :isv a .sideview'. partly in section of :35 the member'for holdingthe polishing rod.

. Fig. isisa-front viewof aidetail of. amodia' fiedxconstruction'.

Eig. 5:..is a similar vi-ewof another modifioation.

40 Fig; 6.is.a;s.ection-ion line -.6..6,.in Figured.

Fig. 7 is a front view andrFigJ-Srisanzend view of another modification.

J: Fig. 91is1 a -.section taken:.thro1igh.aper-. .aforated die. and :the holder therefor showing- I '45 qthe'die before: the opening'thereinzis polished nd finished; .and Fig.nzis. a similar view U showing-the die completed.

-" On the: drawings :the same; numerals tidentifv :the. same parts. throughout.

.50 a Irrt-heydetaileddescriptionof the invention I shall refer first to Figs. 9. and '10, wherein the numeral'l indicates a cup-shaped holder for the body of the die 2 which may havethe form of a round block or disc of suitable material, such as steel, with a centralopening 4:. This opening or bore is flared or enlarged at its ends 5 and6, the enlargement -6. at one end being smaller than at the other end, and the bottom of the holder 1 has a counter bored opening 7 which is a continua- --tion oftheenlarged opening 6 of theperfora- -tion or. passage 4. To polish the. opening in the die. 2, .the inside surface thereof. must be .made perfectly smooth by removing all edges and .corners until it has the .contourindicated .at 8 in Fig. 10. The endin view is gained 'byrotating. this die and at the same time reciprocating in the perforation 4 a polish- :ingxrod indicated on Figs.v 1 and 2 by the numeral 3. .The rod 3 both reciprocates and oscillatesin the opening 4, and thesame time the holder 1 and die 2 are simultaneously rotated, .so :that the opening 4 is polished uniformly over :its, entire inside surface until it is perfectlysmooth and curved as indicated on Fig. .10 at 8.

The apparatus for giving this result comprises a standard 9 to which is aflixed a laterally extending bearing .10. having two aligned vertical bearings. 11 and 12. Adjacent its. upper end it may have a. bracket. 13 and this bracket and the standard 9 will have alined horizontal bearings 14 in which is rotatably mounted an operating shaft 15 which carries a crank 16 on one end, the other end carryingr a pulley 17 aflixed tothe shaft to be engaged and turned by a cord or belt 18. The pin .off the :crank 161'e11gages a link 19 having projection 20 on one edge and a pair of projections 21 on the other. Placed between the projections 20 .and 21 'is a carrying bar. 22

and the projection 20 mounts a tightening screw 23to secure this bar firmly to the link 19. To the bar is firmly attached the polishing rod above mentioned. By'thisconstructi-on the bar or member 22 can. be adjusted up and down with respect to the link 19 and firmly held in any desired .position. .Afii-Xed to the standard 9 isa prowjection24 which bears afixedstem 25, and

at one side of the link is an eyelet 26. Between this eyelet and the outer end of the stem 25 extends a spring 27 which tends to draw the member 22 and polishing rod 23 in one direction; so that as the crank turns and the rod 3 is oscillated and reciprocated and passes up and down through the opening inthe die 2, it is always urged against one side of this opening.

The holder 1 for the die is cup shaped and is adapted to be secured in a coupling element 28 which carries a binding screw 29 to make the die holder fast to this coupling. One end of the coupling, which is likewise cup-shaped and has an open bottom, is provided with a threaded boss 30. This boss projects from the bottom and screws into a hollow section of shaft 31 which is surrounded by a bushing or jacket in the bearing 12. A coupling 33 is attached to the lower end of the section 32 by a binding screw 34 and this coupling 33 may have a projecting boss 35 to receive a stepped grooved pulley 36 to be driven by a cord or belt 37 from any suitable source of power like the cord 18. This pulley, of course, allows the shaft section 31 to be driven at different speeds. The shaft 35 may project through the pulley 36, can be reduced at its lower end to be received in the bearing 11 and a screw 38 may be engaged with the opposite end of the shaft 35 to adjust the shaft 35 in section 32 upward to the extent required. Of course the shaft 35 may extend only part way into the pulley 36 and a separate shaft may be secured in the opposite end of the pulley 36 to be received in the bearing 11.

Hence in operation as the shaft 15 is rotated the polishing rod 3 will be reciprocated and oscillated in the opening of the die 2; while the die will be revolved by the power applied to the cord 37 acting on the pulley 36. The rod 3 thus moves up and down and from side to side in the opening through the die 2 and is pulled by the spring 27 to make contact continuously with one side of the opening 8. This whole inside sur face of the opening 8 is smoothed off and given the contour shown in Fig. 10.

The member 10 may be adjusted up and down by means of a projection or rib 39 on the side of the standard 9 which enters an opening or slot in the member 10 and binding screws 40 passing through the sides of the member 10 engage the rib 39 to hold the member 10 in adjusted position. This guide or rib 39 may have the shape of a dovetail and the slot within the member 10 may be correspondingly formed.

The bar 22 as shown in Fig. 3 has a threaded bore in one end to receive a holder 41 for the rod 3. This holder has its upper end threaded, as indicated in 42, to screw into the bar 22 as far as the collar 43 will permit. The other end is open and split as indicated at 44 to receive the rod 3, and between the ends the element 41 has outside threads 45. A sleeve 46 screws over the slotted end 44 and has threads to engage the threads 45. The end 44 tapers and the bore 47 through the sleeve 46 also tapers; so that as the sleeve 46 is turned up it makes the slotted end 44 of the holder 41 grip the rod pretty securely. The rod 3 can, of course, be adjusted in the hole 41.

In Fig. 4 the upper end of the link 19 is shown as being slotted to receive the pin of the crank 16 thus making a yielding connection between the crank and the link 19.

Figs. 5 and 6 show a modification wherein the top of the standard 9 has no bracket 13, but carries a transverse rail 49 on which is slidably-mounted a head 50. The shaft 15 passes through the head and the guide 49 has a slot 51 to permit the shaft 15 to move with the head 50. The head has a projection 52 to receive a screw stud 53. To one end of the guide 49 is attached a yoke 54, the arms of which have smooth openings through which the stud 53 projects. Between the arms of :1;

the yoke 54 is a nut 55 on the threaded stud 53. By turning the nut the head can be adjusted on the guide or rail 49.

In Figs. 7 and 8 the top of the standard has only one bearing 14 and the end of the shaft carries a disc 56 hearing a crank pin 57. To the top of the standard 9 is secured a bracket 58 and on this bracket is affixed a horizontal bar 59. Depending from the ends of the bar 59 on pivoted pins are the links 60 and 61 the latter being slotted to receive the crank pin 57. The lower ends of these links are pinned to connecting bar 62. On this connecting bar is a perforated support 63 through which passes the bar 22 carrying the polishing rod 3 and encircling the bar is a collar 64 adjustably held by a binding screw 65 to keep this bar 22 from slipping out of the support 63. This construction gives the polishing rod an oscillating movement and reciprocating movement in another manner.

In the construction shown in Figs. 5 and 6 the head 50 can, have inwardly projecting ribs 66 along its lower edges to engage guide grooves 67 in the sides of the standard 9.

With this apparatus a die for thedrawing of wire can be very quickly and effectively worked and polished to give the opening therein the smooth surface and shape required to enable the wire to be drawn in the proper manner.

I claim:

1. In a device for polishing a die, consisting of an upright standard, an adjustable mounting on the standard, a movement receiving part associated with the mounting, a holder connected to be operated by the move ment receiving part and including two principal members, one member including a body adapted to engage a polishing rod, and the other member including a binder for securing the polishing rod to the body.

2. In a device for polishing a die, consisting of a standard and a mounting on the standard, a movement receiving part associated with the mounting, a holder connected with said part to be operated thereby, said holder being adapted to receive a polishing rod, a binder for securing the polishing rod to the holder, and resilient means for restricting the operation vof the holder consequent upon its operation by said part.

3. In a device for polishing a die, consisting of an upright standard, an adjustable mounting on the standard, a movement receiving part associated with the mounting and a holder connected with said part to be operated thereby, a polishing rod, and a connection connecting said polishing rod to said holder, said connection being connected for adjustment to vary the position of said rod relatively to said holder.

In testimony that I claim the foregoing as my invention, I have signed my name hereto.

FREDERICK KRAUSE. 

